Application of Polymath Chemical Equilibrium Simulation Model for Struvite Precipitation in Soils

Miyittah, Michael K.; Gadekar, Sachin; Pullammanappallil, Pratap; Stanley, C. D.; Rechcigl, J. E.

doi:10.1007/s11270-011-1000-9

Cited by 6 publications

(4 citation statements)

References 29 publications

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“…Antibiotic wastewater is rich in nitrogen that can be recovered to form MAP, while the utilization of MAP as an effective fertilizer would favor the reduction of the application of rock phosphate in the agricultural sector. Besides, MAP precipitation in wastewater and for reuse and NH 4 + -N emission reduction can reduce cost and may be a safe practice for sustainable environmental nutrient management (Miyittah et al 2012), and sustainable treatment of the wastewater enriching with N and P. Rate of N release also depends on the MAP particle size. The smaller particle sizes released more N than the bigger particles.…”

Section: Economic Evaluationmentioning

confidence: 99%

Sustainable Treatment of Antibiotic Wastewater Using Combined Process of Microelectrolysis and Struvite Crystallization

Zhang

Chen

Wang

2015

Water Air Soil Pollut

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The aim of this study was to investigate the synergistic effects of the process of iron-carbon microelectrolysis (ICME) followed by struvite (MAP) crystallization on treating antibiotic wastewater. Characteristics of ICME effluent depended mainly on the iron to carbon mass ratio (Fe/C). The optimum reaction conditions of Fe/C ratio of 2:1 and reaction time of 90 min were observed. The ICME effluent was further treated by MAP crystallization using Na 2 HPO 4 ·12H 2 O and MgCl 2 ·6H 2 O as precipitation agents. The results showed that, the Mg 2+ /NH 4 + -N/ PO 4 3− -P molar ratio of 1:1:1 and pH 8.5, were suitable for the crystallization process, which could obtain highquality MAP containing 5.18 % N,10.23 % Mg, and 13.83 % P. Optimal total removal rate of COD and NH 4 + -N removal rate achieved 84.6 and 89.9 %, respectively. The economic evaluation of NH 4 + -N recovery by the synergistic process was also conducted, indicating that the synergistic process had the potential to benefit COD emission reduction and nitrogen recovery.

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Section: Economic Evaluationmentioning

confidence: 99%

Sustainable Treatment of Antibiotic Wastewater Using Combined Process of Microelectrolysis and Struvite Crystallization

Zhang

Chen

Wang

2015

Water Air Soil Pollut

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“…So it was used as Si‐Ca‐Mg fertilizer or to improve agricultural soil (Wang et al, 2020). In addition, MS can theoretically stabilize Cd in acid soils and reduce the content of Cd in crops because of its high pH (Miyittah et al, 2012; Seco et al, 2017). Moreover, Ca and Si contained in MS can change the form of As in the soil and reduce its toxic effect on plants.…”

Section: Introductionmentioning

confidence: 99%

Magnesium slag for remediation of cadmium‐ and arsenic‐contaminated paddy soil: A field study

Zhang

Tan

Duan

et al. 2022

Soil Use and Management

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The accumulation of heavy metals like cadmium (Cd) and metalloids like arsenic (As) in plants can do harm to human health through the food chain, especially through the rice (Oryza sativa L.). To solve this problem, this study researched the application of magnesium slag (MS) and polyaspartic acid (PASP), which could accelerate rice growth and improve yield, increase soil pH and activate rice enzyme activity as well as reduce the bioavailability of Cd and As in the soil. After these two different treatments, rice yield increased by 17.0% and 18.9%, respectively. Meanwhile, the bioavailable As decreased by 49.1% and 42.5%, while the bioavailable Cd reduced by 72.6% and 44.3%. Besides, the Cd content in rice grains reduced by 77.7% and 17.3%, respectively, after two different treatments. In the MS treatment, the As content in rice grains was reduced by 21.8%, but showed no significant response to the other treatment. The contents of bioavailable Cd and As (determined by one‐step extraction) in soil were decreased by MS and PASP, which was favourable for the reduction of Cd and As accumulation in rice. The health risk assessment showed that the application of passivators can effectively reduce the risk of carcinogenesis, but it was still unacceptable. The application dose of MS and PASP still needs further exploration.

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“…An examination of the soil map and historic analytical soil data of the Sumas region in the Lower Fraser Valley (Luttmerding 1981a, b) shows that the soils (Vye and Buckerfields soil series) have been affected by serpentinic sediments and have higher values of exchangeable Mg than Ca, notably in the lower solum. While it is commonly believed that the primary sources of soil phosphorus are the Ca-apatites (Brady and Weil 2008), it has also been suggested that soils receiving high levels of animal manures and those with high magnesium contents might in fact form the more water-soluble Mg-phosphates (Ajmone-Mason et al 2005;Miyittah et al 2012). However, there is little reference in the literature to Mg-phosphates in soil.…”

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confidence: 99%

“…Rivadeneyra et al (1992) postulated that soil struvite is a biogenic mineral based on its association, in nature, with biological activity, and the success in producing struvite in vitro. Miyittah et al (2012), in their application of the ''polymath chemical equilibrium model'' for struvite, concluded that the solid phase of struvite is difficult to predict in soil, though it is present in soil and is controlled by the magnesium ion and pH. Josan et al (2005) provide evidence that Mg-phosphate phases could control P solution activities and that the crystallization of Ca-phosphates, even at neutral pH values, could be pre-empted by Mg-P association.…”

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confidence: 99%

Serpentine affected soils and the formation of magnesium phosphates (struvite)

2013

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Baugé, S. M. Y., Lavkulich, L. M. and Schreier, H. E. 2013. Serpentine affected soils and the formation of magnesium phosphates (struvite). Can. J. Soil Sci. 93: 161–172. The Sumas River watershed, located in the intensive agricultural region of the Lower Fraser Valley of British Columbia (Canada), contains serpentine asbestos from a natural landslide. Serpentinic soils have a high Mg to Ca ratio that can affect soil fertility, including soil-solution P relations. The objectives of the study were: (i) to evaluate some common methods of estimating plant available phosphorus in the surface horizons of the serpentine-affected soils and those receiving large quantities of livestock manure, and (ii) to determine if there is evidence for the formation of soluble Mg phosphates, e.g., struvite, a meta-stable P phase in these soils. Seven soil nutrient extractants were used to determine major and minor elemental concentrations. Acid ammonium oxalate, 1 M HCl and Bray P1 extractions were most effective for measuring available phosphorus in these soils. Manure and fertilizer applications appear to favor the formation of Mg-phosphates, and are considered to be more soluble in terms of phosphorus than either calcium-phosphates or aluminum/iron-phosphates. X-ray diffraction, scanning electron microscopy and nuclear magnetic resonance examinations gave positive evidence for the presence of struvite in the soils.

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Application of Polymath Chemical Equilibrium Simulation Model for Struvite Precipitation in Soils

Cited by 6 publications

References 29 publications

Sustainable Treatment of Antibiotic Wastewater Using Combined Process of Microelectrolysis and Struvite Crystallization

Sustainable Treatment of Antibiotic Wastewater Using Combined Process of Microelectrolysis and Struvite Crystallization

Magnesium slag for remediation of cadmium‐ and arsenic‐contaminated paddy soil: A field study

Serpentine affected soils and the formation of magnesium phosphates (struvite)

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